I would like to know if it's possible to have a microstrip on a layer and another on another and make the wave travel from the micro strip underneath to the one above? and should i have a ground plane sandwiched between the two?
I have tried this, but it doesn't seem to be working great.
I think if the Bottom(lowest one) layer has been defined as GND layer, the second Strip Line will behave as Microstrip Line.
Try to cancel this layer ( GND ),it should work..
So yes my problem is impedance discontinuity, and i don't know how to calculate my via diameters. i have just put a random value and tried to change it to see how it influenced my S parameters.
Is there any litterature you can recommend to me about this please? i'd be grateful.
I agree with FvM, try to keep the width between line and via, by using one large via or two smaller vias side by side. The parameter for tweaking S11 is then the diameter of the cutout in ground.
yes it is possible. Usually it is a microstrip layer on the back side, a via thru the middle of the board, and a microstrip layer on the top side. And trhe dimensions of the via and ground holes are critical.
It is much more troublesome to have a structure in the middle of the board....like a stripline buried layer transitioning to a top microstrip layer. I personally have never had any luck getting that to work.